Antistatic molded article comprising a polyesteramide resin
AssigneeDsm N.V.
InventorMotoji Abe
Life of this patent
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Abstract
An antistatic molded resin article based on polyesteramide has a low resistivity even when a substantive amount of electrically conductive additive is not used. The molded article is prepared by copolymerizing (a) a cyclic amide and (b1) cyclic ester or a mixture of cyclic ester (b1) and at least one linear ester (b2) selected from polyesterpolyol, polyesteretherpolyol or polycabonatepolyol. The surface resistivity is less than 1013Ω.
Claims54
An antistatic molded article comprising a polyesteramide resin, wherein said molded article is prepared by copolymerizing a cyclic amide and at least one cyclic ester, said molded article having a surface resistivity of less than 1013Ω.
A polyesteramide resin prepared by reacting
- 100 parts by weight of (a) a cyclic amide,
- 5 to 50 parts by weight of a mixture (b1) a cyclic ester and at least 5 parts by weight of a linear ester (b2) selected from the group consisting of polyesterpolyol, polyesteretherpolyol and polycarbonatepolyol and
- (c) a chemical compound having a molecular weight of 200 or smaller and having at least 2 hydroxyl groups, wherein said resin has a number average molecular weight, reduced from polystyrene, of from 4,000 to 100,000.
A method for preparing an antistatic polyesteramide resin by ring-opening copolymerizing (a) a cyclic amide and (b1) a cyclic ester in a weight ratio of from 100:3 to 100:44.
A method for preparing an antistatic polyesteramide resin by copolymerizing (a) a cyclic amide and a mixture of (b1) a cyclic ester and a linear ester (b2) selected from the group consisting of polyester polyol, polyesteretherpolyol, and polycarbonatepolyol, in a weight ratio of from 100:2 to 100:50.
A method for preparing a polyesteramide resin by reacting 100 parts by weight of (a) a cyclic amide, 5 to 50 parts by weight of a mixture of (b1) a cyclic ester and at least 5 parts by weight of (b2) at least one linear ester selected from the group consisting of polyesterpolyol, polyesteretherpolyol, and polycarbonatepolyol, and a chemical compound (c) having a molecular weight of 200 or smaller and having at least 2 hydroxyl groups.
A method for making a polyesteramide resin antistatic, wherein the polyesteramide resin is prepared by ring-opening copolymerizing (a) a cyclic amide and (b1) a cyclic ester, wherein the weight ratio of the cyclic amide (a) to the cyclic ester (b1) is set in a range of from 100:3 to 100:44.
A method for making a polyesteramide resin antistatic, wherein the polyesteramide resin is prepared by copolymerizing (a) a cyclic amide and a mixture of (b1) a cyclic ester and (b2) a linear ester selected from the group consisting of polyesterpolyol, polyesteretherpolyol, and polycarbonatepolyol, wherein the weight ratio of the cyclic amide (a) to the mixture of the cyclic ester (b1) and the linear ester (b2) is set in a range of from 100:2 to 100:50.
A method for making a polyesteramide resin antistatic, wherein the polyesteramide resin is prepared by copolymerizing (a) a cyclic amide and a mixture of (b1) a cyclic ester and (b2) at least one linear ester selected from the group consisting of polyesterpolyol, polyesteretherpolyol or polycarbonatepolyol, wherein the weight ratio of the mixture of the linear ester (b2) and the cyclic ester (b1) is set in the range of from 100:5 to 100:50, wherein the weight ratio of the linear ester (b2) to the cyclic amide (a) is at least 5:100, and a chemical compound (c) having a molecular weight of 200 or smaller and having at least 2 hydroxyl groups.
Dependencies are inferred from the claim text.